vassae



(Model.) 4 Y R. G. VASSAR.

. BURGLAR ALARM.

N0. 298,137. Patented May 6, 1884.

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ROBERT G. VASSAR, `OF NEW YORK, N Y.

BuReLAR-ALARM.

SPCIFICATION forming part-of LetteraPateIit No. 298,137, dated May 6,1884.

l Application led August 523, 1883. (Model.)

To all whom it may concern/.-

Be it known that I, RoBT. G. VAssAR, a citizen of the United States, anda resident of New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Burglar-AlarmCatches, of which the following is a specification.

My invention relates to burglar-alarms designed for application todoors, window-sashes, or other objects, and constructed to automaticallyrelease or operate an alarm upon movement of the door or other objectupon an attempt to open the same.

The object o f my invention is to provide a simple, cheap, and effectivedevice for this purpose, and among other things to furnish a deviceapplicable to a window in such a way that both sashes may be left open,but that an attempt to move." either sash after the alarm is set willresult in the' release of the alarm mechanism..

To these ends my invention consists in the combination, `with afreely-movable catch orv catch-bar adapted to rock on two points orfulcrums removed from one another, of an alarm mechanism whose detent isconnected with the bar, so that by the rocking of the bar on eitherfulcrum the detent will be operated and the alarm caused to sound.

My invention consists, also, of certain details of construction andcombination of parts, that will be specied in the claims.

In the accompanying drawings, Figure l is an elevation of aburglar-alarm mechanism embodying my invention.` Fig. 2 is a plan of thesame, a portion of the bell being broken away in order to better showthe parts. Fig. 8 is a plan with the top plate of the alarm mechanismremoved. Fig; 1l shows in vertical cross-section a portion of a windowwith the alarm applied.

A indicates the base-plate upon which the parts are mounted, and whichplate is adapted vat its ends `against the edge'of the bar, serves,

by -entering notches on the edge thereof, to hold said bar with endprojected, as shown, to enter a suitable socket or retracted out ofengagement 'with said socket. Resting on the bar is a movable plate, G,supported or en- .gaging with the bar at the intermediate portionthereof inv such way that if the bar be made to rock at one end or theother upon the edge of plate A said plate G will be raised, and thuscaused to release the detent of an alarm mechanism of any suitable kind.

As will be observed, the catch-bar B, when engaging with a socket, willbe caused to rock A and raise the plate G by a'movement in eitherdirection of the support for said bar or of the socket with which its.proj ecting end engages. The plate G is provided, as shown, with anupwardly-extending portion, b, from which extends laterally a plate orarm, D, that engages with a detent, E, for an alarm mechanism. The plateG is guided by sleeves @,connected to the portion b thereof, andencompassing posts connecting plate A and a plate, M, in which twolatter the arbors ofthe alarm are mounted. The pin E is guided in plateM, and is held down by a spring, N, so that its lower end tends to enteran opening. F, in a wheel, G2, for the alarm-movement, thus locking thelatter from movement. Ihe arm D engages with an enlargement o n thepinE, and when the bar B is tilted lifts the pin out of the opening F,thus allowing the alarm to be sounded.i The spring N causes the pin tore-engage with the wheel if the pressure tending to tilt the bar hasbeen removed;

The alarm-movement is of any ordinary or proper construction. That whichI prefer to employfor the sake of simplicity consists of themainspring-wheel G2, the mainspring for which is wound up by the handleH upon the main'- Vspring-arbor, and an escapement-wheel, l?,

whose escapement operates the bell-hammer in the usual way. I do not,however, limit myself to the form or kind of alarm-movement, nor to theparticular kind of detent released by the tilting of the bar B, as thesemay be varied in many ways.

Fig. 4. shows the application of the alarm to a window. The plate A isfastened to the meeting-rail of the lower sash, while the end of thecatch-bar may engage at its projecting IOO end with a socket in theupper Sash, one or more of sueh sockets being provided, so that theupper and lower sashes may be left open to any desired extent, and thealarm will be released upon the application of an upward or a downwardpressure to either sash.

That I claim as my invention is* l. The combination of the sliding barB, the transversely-movable plate G, the detentpin E, and the perforatedwheel G2 of an alarmmovement.

2. rlhe combination of the oatch-barl3, having two fulorunis upon theplate A, pin L, plate or support G, for the alarin-detent, and wheel G2,controlled by said detent, as set forth.

The combination of the plate A, spring K, notched sliding,` bar B,adapted to work 1 freely in a transverse direction on a pin, L, f

and an alarm controlled by a connection with the bar B at a portionthereof which moves upon pin L when the projecting end of the bar risesor falls above or below its normal plane.

4. The combination of the sliding,r bar working freely in a plane atright angles to its sliding movement, so that it may rock on either oftwo pivotal points on the same side ofthe bar, and an alarm controlledby conJ neet-ion with the bar at a portion thereof which moves in thesame direction irrespeet ive of the direction in which its projectingrend moves when the bar rocks.

Signed at New York, in the county of New York and State of New York,this 15th day of August, A. D. 1883.

KOBERT G. VASSAR.

XVitnesses:

THos. Tommy, GEO. C. CoFrIN.

